now-flow/src/providers/aws/get-lambda-handler.js

Add deployment workflows to Zeit now

const getHandler = require('../../serverless/get-handler')

// generate the handler that we'll use as the ƛ function
const getLambdaHandler = desc => {
	// the command that our handler will invoke to fire up
	// the user-suppled HTTP server
	let cmd = null
	let script = null

	if (desc.packageJSON) {
		if (desc.packageJSON.scripts && desc.packageJSON.scripts.start) {
			cmd = desc.packageJSON.scripts.start
		} else {
			// `node .` will use `main` or fallback to `index.js`
			script = './'
		}
	} else {
		if (desc.hasServerJSFile) {
			script = 'server.js'
		} else {
			script = 'index.js'
		}
	}

	return getHandler({ script, cmd }, (makeRequest, getPort, req, ctx, fn) => {
		const url =
      req.path +
      '?' +
      require('querystring').stringify(req.queryStringParameters)
		const proxy = makeRequest(
			{
				port: getPort(),
				hostname: '127.0.0.1',
				path: url,
				method: req.httpMethod,
				headers: req.headers
			},
			proxyRes => {
				let body = ''
				proxyRes.on('data', data => {
					body += data
				})
				proxyRes.on('error', err => {
					fn(err)
					body = ''
				})
				proxyRes.on('end', () => {
					fn(null, {
						statusCode: proxyRes.statusCode,
						headers: proxyRes.headers,
						body
					})
				})
			}
		)
		proxy.on('error', fn)
		proxy.end(req.body)
	})
}

module.exports = getLambdaHandler